Chattanooga (CHA) to Chicago (ORD): On-Time Performance
Data through May 2026
When you fly CHA to ORD matters as much as anything else about the booking: the route swung from 88% on-time in August 2025 to just 41% in March 2025. Across the full period the route averages 71% on-time against a national 78%. Morning departures also hold up better than evening ones (81% vs 56%), which matters most in the rough months.
- On-time
- 71%
- arrived <15 min late
- Avg delay
- 25 min
- completed flights
- Cancelled
- 2.8%
- Flights/day
- 2.6
- last 12 months
- Duration
- 2h 8m
- scheduled
- Distance
- 501 mi
Best airline from CHA to ORD
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Airmost reliable | 75% | 15 min | 2.3% | 175 |
| Republic Airways | 72% | 18 min | 2.1% | 384 |
| SkyWest Airlines | 70% | 28 min | 3.1% | 1,228 |
Monthly on-time trend
Best time to fly from CHA to ORD
Aim for departures around 7 a.m. (86% on-time); avoid 5 p.m. departures (55%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 68% | 25 min |
| Tuesday | 72% | 20 min |
| Wednesday | 75% | 29 min |
| Thursday | 69% | 19 min |
| Friday | 68% | 31 min |
| Saturdaybest | 79% | 19 min |
| Sunday | 67% | 28 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft33%
- Airline operations38%
- National airspace system23%
- Weather6%
Frequently asked questions
- How often are flights from CHA to ORD delayed?
- 29% of CHA–ORD flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 25 minutes.
- Which airline is most reliable from CHA to ORD?
- Envoy Air has the best on-time record on this route at 75%, based on 175 flights. 3 airlines flew CHA–ORD frequently enough to compare in this period.
- What is the best time of day to fly from CHA to ORD?
- Departures around 7 a.m. have the best record (86% on-time), while departures around 5 p.m. have the worst (55%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from CHA to ORD?
- The scheduled CHA–ORD flight time averages 2h 8m over 501 miles. Actual arrival times vary — flights on this route land 15+ minutes late 29% of the time.
- How often are CHA to ORD flights cancelled?
- 2.8% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from CHA to ORD?
- March 2025 was the roughest month in this dataset, with only 41% of arrivals on time. The best was August 2025 at 88%. If your dates are flexible, that 47-point gap is worth planning around.
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Based on 1,787 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.